RGB Channels Image

Free

Split a photo into its Red, Green, and Blue channels, in grayscale or colorized form, merge them back, and download as a ZIP, directly in your browser.

Runs entirely in your browser. Your image is never uploaded anywhere.

Click to choose an image, or drag and drop one here

Recent Activity

Visible to everyone. Last 20 uses across all visitors, newest first.

4032×3024 · RGB · Greyscale

1 week ago

3024×4032 · RGB · Greyscale

1 week ago

Comments (0)

Found this tool useful? Leave a comment, share a tip, or tell us how we can make it better.

No comments yet. Be the first to share your thoughts!

What this tool does

Splits a photo into its Red, Green, and Blue color channels directly in your browser, shown as either grayscale or colorized images. Pick which channels to include, optionally merge them back into a single combined image, click any result to zoom in and inspect it up close, and download individual channels or all of them together as a ZIP file.

How It Works

Every pixel in a photo is stored as three numbers from 0 to 255, one each for Red, Green, and Blue. This tool reads out just one of those three numbers per pixel for each channel you select, ignoring the other two entirely. In Greyscale mode, that single number is written into all three output channels, producing a black-and-white image where brightness shows that channel's original intensity. In Colorized mode, the number is written only into its own channel's slot, with the other two set to 0, so a Red channel image, for example, only ever shows shades of red. When "Merge" is enabled, the tool skips producing separate images and instead writes each selected channel's number directly into its slot of one shared output image, filling any deselected channel's slot with 0, which is also how selecting all three channels and merging perfectly reconstructs the original photo.

Problems it solves

Diagnosing which color channel is causing excess noise or grain in a photo.
Previewing what a photo looks like with one color channel completely removed.
Extracting a single channel for use as a mask or input in another image-editing workflow.

Frequently asked questions

›What is the difference between "Greyscale" and "Colorized" output?

Greyscale shows each channel's raw intensity as a black-and-white image: a bright area in the Red channel image means that area had a high red value, regardless of what the actual on-screen color was. Colorized instead shows that same intensity but tinted in the channel's own color (red, green, or blue), with the other two channels zeroed out, which makes it easier to see at a glance which channel you're looking at.

›What does "Merge selected channels into one image" do?

Instead of showing each selected channel as its own separate image, it combines them directly into one RGB image, using 0 for any channel you left unchecked. Selecting all three channels and merging reconstructs your original photo exactly; unchecking one channel and merging shows what the photo would look like with that channel completely removed.

›Why would I want to isolate a single color channel?

It is a common step in photo editing and analysis: a channel with unusually high noise or a channel that dominates a color cast is often easiest to diagnose by looking at it completely on its own, separated from the other two.

›Can I download all the channel images at once?

Yes. Once you have more than one output image showing, a "Download All (ZIP)" button appears that packages every visible channel image into a single .zip file, or you can download any individual image on its own with the button underneath it.

›Is my photo uploaded anywhere?

No. The channel extraction happens entirely in your browser using the HTML canvas API, and the ZIP file is built locally too. Nothing is sent to a server.

›Can I zoom in on a channel image to check fine detail or noise?

Yes. Click any channel image to open it in a full-screen viewer, then scroll or pinch to zoom in up to 8x and drag to pan around, useful for checking pixel-level noise or detail that is hard to judge at thumbnail size. Close it with the × button, the Escape key, or the Reset button to return to 100%.